Simplify banxa flow using WebBrowser

[nop33]

This PR:

1. Simplifies BuyModal code
2. Relies on the OS's native browser and opening a tab * within the app * (does not create a new task in the task manager - we're still in the app)
3. Fixes rendering issues reported by testers (see below)
4. Fixes Google Pay
5. Adds Buy button in Receive screen and uses selected receive address
6. Adds text below icons in dashboard card buttons
7. Fixes loading glitches
   • Fix UI glitch on data loading #1089

Related website PR

• Update banxa callback text www#181

Demo

Kapture.2025-01-08.at.10.43.36.mp4

Rendering issues

Click to see screenshots

Tab icons show at the bottom of the webview after switching between apps:

[changeset-bot]

⚠️ No Changeset found

Latest commit: f493f90

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[mvaivre]

Great job!!